Ginsburg, 85, awoke Thursday feeling pain and went to George Washington University hospital, the Supreme Court said in a statement sent to news outlets. Medical staff said she fractured three ribs on her left side.

Known as RBG, Ginsburg is the oldest justice on the court and leads its liberal wing. She is one of three Jewish justices on the court.

Ginsburg was due to attend the investiture of the newest justice, Brett Kavanaugh, on Thursday.